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-TERRO-METALLIG. PAVING STONE S L A B &

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.L. PRMOLI.'

'FERRO-METALLIC PAVING STONE, SLAB, m. No. 345,726. v` Patented July ZO,1886.

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L. PRO MMMMMMM 'FERRO-METALLIC PAVING STONE, SLA BBBBBBBB i o. 345 7 2 6l P a t e n t e d J u 1 y 2 0 1 8 8 6 Y @Mll mmummnun im UNTi-io STATESPATENT OFFICE.

LOUIS PROMOLI, OF TORONTO, ONTARIO, CANADA.

-TERRO-METALLIC` PAVING-STONE, SLAB, 86C.

SPECIFICATION forming part of Letters Patent No. 345,726, dated July 20,1886.

Application filed Muy 16, 1885. Serial No. 165,753.

(No model.) 'Patented in Canada February 27, 1882, No, 14,260.

.To all whom it may concern:

Be it known that I, LoUis PRoMoLI, a subject of the Emperor of Germany,manufacturer, residing at the city of Toronto, in the county of York,and Province of Ontario and Dominion of Canada, have invented certainnew and useful Improvements in Ierro-Metallic Paving-Stones, Slabs,Tiles, or the like; and I do hereby declare that the following is afull, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in pavingstones designed for usein streets, sidewalks, stables, cellars, house-yards, Ste.; and

it has for its object to construct the same in such a manner that whenlaid the raising or sinking of an individual stone below or above a lineon a horizontal plane with the remainder of the pavement will beprevented, and to provide a paving-stone which shall be of a minimumweight, thus enabling them to be readily transported at a comparativelyslight cost.

With these ends in view, the invention consists in the improvedconstruction and arrangement of parts, hereinafter fully described, andpoint-ed out in the claim.

In the drawings, Figurel is a plan view of a portion of a pavement madeup from one form of my improved paving-stones. Figs. 2, 3, 4, and 5 areperspective views of different forms employed. Fig. 6 is a detail viewof .the form of stone used for the curbs.

In the accompanying drawings, in which like letters of referenceindicate corresponding parts in all the iigures, A represents thepavement, and B the stones composing the same. The said stones B may beof any desired or suitable form; but are preferably rectangular, andformed at their upper ends with beveled edges a,which afford aiirmfoothold for man and beast. The said stones B are preferably formed ofclay molded to the proper form, and made by a peculiar process, forwhich an application for Letters Patent hasbeen filed of evendateherewith. The said stones may, if desired, be formed on their upperor exposed faces with any preferred design, or may be left plain, asdesired. If desired, said stones may be formed upon their .are formedbeveled they will form canals d,

and that this will not be necessary, except in cases where the upperedges of the stones are plain.

The stones B are formed at one side and end with a horizontally-arrangedtongue, O,which is located preferably midway the upper and lower end ofthe stone, while the other side and end are formed with grooves D toreceive the tongues of the adjacent end and side stones.

In molding the stones B the same are preferably formed with openings E,which, when the pavement is laid, are filled preferably with sand,- thisserving to deaden the sound which would otherwise be produced were they(the openings) left unfilled.

In constructing the curb-stones the same are preferably provided attheir opposite ends, as shown, respectively, with a groove and tongue,and are also preferably formed with openings to be filled with sand.

The advantages attendant upon the employment of paving stonesconstructed as described are numerous, chief among which may bementioned that they may be readily and quickly laid, that the stonesserve to mutually support each other lby the ribs 'fitting the groovesof the next adjacent stone, and also that Water, Ste., is quicklycarried off.

The stones before described are adapted for a variety of purposes; henceI do not wish to be limited to their use for the purposes described.

I claim as my invention and desire to secure by Letters Patent- A pavingblock or stone made hollow and having all its upper edges beveled, atongue on one side and end of the stone and agroove on the other sideand end, substantially as set forth.

In testimony whereof` I aflix my signature in presence of witnesses.

LOUIS PROMOLI. W'itnesses:

GERHARD HEIMROD,

Imperial German Consul. WlLLIAM MITCHELL, W. H. BEATTY.

